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Surface maintenance method of high chromium steel cold roll

A technology of surface maintenance and cold rolling, which is applied in the direction of keeping rolling equipment in an effective state, metal rolling, metal rolling, etc., and can solve the problems of high chromium steel rolls without maintenance technology, and the surface of high chromium steel cannot be cleaned and protected. To achieve the effect of reliable protection

Active Publication Date: 2016-09-28
铜陵市大明玛钢有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing high-chromium steel rolls do not have a special maintenance process, and cannot effectively clean and protect the surface of high-chromium steel, so a surface maintenance method for high-chromium steel cold rolls is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1: (1), surface spraying: send the high chromium steel cold roll into the long 5m airtight channel, the airtight channel inner wall length direction is connected with the high-pressure nozzles that can be sprayed and atomized aviation kerosene distributed at equidistant intervals. The distance between two adjacent high-pressure nozzles is 0.3m, the forward speed of the high-chromium steel cold roll is 2m / min, and the pressure is kept at 0.4MPa in the closed channel; (2), segmental freezing: send the high-chromium steel cold roll to Put it into the freezer for segmental freezing, the freezing temperature of the first segment is -6°C, and the freezing time is 10min. The second-stage freezing temperature is -8°C, and the freezing time is 5 minutes; (3), physical impurity removal: take out the high-chromium steel cold roll and gently pat its surface, and then wipe it repeatedly with cotton cloth for 3 times; (4), coating protection Layer: Mix 70wt% oleic acid and...

Embodiment 2

[0008] Embodiment 2: (1), surface spraying: send the high chromium steel cold roll into the closed channel with a length of 6m, and the inner wall of the closed channel is connected with high-pressure nozzles that can spray and atomize aviation kerosene distributed at equal intervals in the length direction. The distance between two adjacent high-pressure nozzles is 0.4m, the forward speed of the high-chromium steel cold roll is 3m / min, and the pressure is kept at 0.5MPa in the closed channel; (2), segmental freezing: send the high-chromium steel cold roll to Put it into the freezer for segmental freezing, the freezing temperature of the first segment is -7°C, and the freezing time is 15 minutes. The second-stage freezing temperature is -10°C, and the freezing time is 8 minutes; (3), physical impurity removal: take out the high-chromium steel cold roll and gently pat its surface, and then wipe it 4 times repeatedly with cotton cloth; (4), coating protection Layer: Mix 70wt% ol...

Embodiment 3

[0009] Embodiment 3: (1), surface spraying: send the high chromium steel cold roll into the closed channel with a length of 7m, and the inner wall of the closed channel is connected with high-pressure nozzles that can spray and atomize aviation kerosene distributed at equal intervals in the length direction. The distance between two adjacent high-pressure nozzles is 0.5m, the forward speed of the high-chromium steel cold roll is 4m / min, and the pressure is kept at 0.6MPa in the closed channel; (2), segmental freezing: send the high-chromium steel cold roll to Put them into the freezer for segmental freezing, the freezing temperature of the first segment is -8°C, and the freezing time is 20min. The second-stage freezing temperature is -12°C, and the freezing time is 10 minutes; (3), physical impurity removal: take out the high-chromium steel cold roll and gently pat its surface, and then wipe it repeatedly with cotton cloth for 5 times; (4), coating protection Layer: Mix 70wt% ...

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PUM

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Abstract

The invention discloses a surface maintenance method for a high chrome roller. The surface maintenance method includes the following steps: (1) surface spraying; (2) subsection rapid freezing; (3) physical impurity removing; (4) protection layer coating; (5) drying, wherein the surface of the high chrome roller is wrapped with a sponge and is pressurized to 1.3 MPa to 1.6 MPa for standing for 10 min to 20 min, the sponge is dismounted, the high chrome roller is dried through hot air, the temperature is maintained to range from 30 DEG C to 40 DEG C, and the drying time ranges from 20 min to 30 min. The surface maintenance method has the advantages that impurities gathered to the surface of the high chrome roller are effectively removed through the steps of surface spraying, subsection rapid freezing and physical impurity removing, the surface is coated with protection film formed by oleic acid and sewage ethyl alcohol, and finally the protection film is shaped through the sponge, so that the protection film is stably attracted to the surface of the high chrome roller, and reliable protection on the surface of the high chrome roller is provided on the premise that utilization of the high chrome roller is not influenced.

Description

technical field [0001] The invention relates to the surface care of rolls, in particular to the surface maintenance method of high chromium steel cold rolls. Background technique [0002] High chromium steel is a major European roll manufacturer from the late 1970s to the early 1980s. On the basis of comprehensive analysis of the technical characteristics and use practice of high chromium steel composite cast iron work rolls, and referring to the material characteristics of SKD-11 cold work die steel, it was developed through experimental research. The chromium content is 8-14%, the carbon content is 0.70-1.4%, and the new cast steel roll material contains alloying elements such as molybdenum, nickel and vanadium. This roll material has excellent thermal crack resistance and high wear resistance. The service life of the high-chromium steel rough rolling work roll is more than double that of the alloy cast steel roll, which not only helps to reduce the cost of rolling materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B28/02
Inventor 张曌章成希
Owner 铜陵市大明玛钢有限责任公司